Download Samsung Firmware SM-L355U

Samsung Watch9 44mm

The latest firmware for Samsung Watch9 44mm (SM-L355U) is L355USQS1AZH4 with Android 17, released on September 1, 2026 for 2 regions (CSC). Every official firmware build for SM-L355U, newest first: one row per build with all regions (CSC) that received it.

Latest build
L355USQS1AZH4 Android 17 · 1 month ago
Builds
2 builds
Regions (CSC)
2 regions

Firmware builds for SM-L355U

Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/L355USQS1AZH4

SM-L355U update history

All 2 builds in our database run Android 17. The newest build, L355USQS1AZH4, was released on September 1, 2026 with the August 2026 security patch. That patch (SMR Aug-2026) fixes 54 vulnerabilities, 8 of them critical. Updates have become rare: SM-L355U received 2 builds over the last 12 months, in 2 different months.

Device specifications

Launched with
Wear OS
Display diagonal
3.81 cm (1.5")
Display technology
AMOLED
Display resolution
480 x 480 pixels
RAM
2 MB
Battery capacity
445 mAh
Weight
34 g
Band colour
Green

Specifications of SM-L355F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

Changelog for SM-L355U

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-L355U?

The newest firmware for SM-L355U runs Android 17: build L355USQS1AZH4, released on September 1, 2026.

When did SM-L355U get its last update?

The latest build for SM-L355U, L355USQS1AZH4, was released on September 1, 2026 (1 month ago).

How often does SM-L355U get updates?

Over the last 12 months SM-L355U received 2 builds, with at least one new build in 2 different months.

Is the firmware for SM-L355U official?

Yes, all firmware files for SM-L355U are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-L355U using Odin?

To flash SM-L355U, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.

Can I downgrade the Android version on SM-L355U?

Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-L355U.